Study On The Synergistic Action Model Of High Voltage Power Transmission Lines Tower And Its Application Influenced By Mining

In this paper, combined with the knowledge of mining subsidence, rock and soilmechanics and structural mechanics, on the basis of synergistic deformation lawsbetween high voltage power transmission line tower and ground movement anddeformation due to undermining,using the method which combined the finite elementsimulation with theoretical analysis, the synergistic acting model of the high voltagepower transmission line tower, groundwork and foundation influenced by mining andits application has been researched systematically.Firstly, the laws of high-voltage tower deformation caused by the five majorsurface movements and deformations including subsidence, slope, curvature,displacement, horizontal strain is analyzed theoretically. Secondly, using the method oftheoretical analysis, the synergistic acting mechanical model was set up, on the basis ofthis model, the flexible curve differential equations of the iron tower trussed structurewere solved based on surface deformation curve and boundary conditions and then theadditional strain and stress in the tower structure were calculated based on the equation.It was verified through a calculated case at last. Then, the synergistic acting finiteelement model was set up by using the ADINA finite element analysis software，thehigh-voltage towe’s dynamic deformation and its laws in the underground miningprocess have been simulated dynamically by using ADINA’s a special function called“Element Birth/Death”, the expression of the functional relation between thehigh-voltage tower and the five major surface movements and deformations wereobtained respectively too. Finally, according to Shanxi Coal Sihe coalmine NO.3303working face’s different establishing pillars, surface movement and deformation havebeen calculated, then the high-voltage towers’ deformations have been calculated usingthe expression of the functional relation between the high-voltage tower and the surfacemovement and deformation, referencing “operatig code for overhead transmission line”,select the optimal mining plan, the optimal establishing pillar size has been determined.Through the above-mentioned research, this article has realized the prediction ofthe security of high voltage transmission line towers which is under the influence ofmining. It provides an important basis of the safe mining of protective coal pillars ofhigh voltage transmission line tower and the protection of high voltage transmission linetower in mining active area. It has the remarkable social efficiency and the economicefficiency.